Maximise a FB page sponsor

I worked on closing a deal with a sponsor for my FB page (page is automotive related, the sponsor is automotive retailer). However my rationale was not to charge for posts because I don't have proof that it will be an effective advertising method that will convert into sales (and potentially lose my sponsor).

Instead what I suggested was exclusive deals for FB fans, access to cost price products for me and collaboration for real life events. I believed this was a fair deal where the fans got something (discounts) their business got new customers and I could get cost price products.
Their influence in the market and connections in the industry are quite important intangible asset that I can see being valuable.

My aim is to provide fans with access to good deals/services, improve their customer base and eventually find a way to make some money off my service/loyalty.

I guess my question is; how do I maximize my success of having a sponsor for my page? what can I do to achieve my goals? How do I keep them happy but not run my page? (>insert ideas here<)

My dot points:
* List requirements & expectations (have them up front, no unexpected surprises)
* Have a strategy list (Also have it approved, so the sponsor is happy)
* Maintain regular communication
* Be upfront with the fans and announce the sponsorship (not incognito subliminally advertise to them)
* Don't spam the page - be subtle and timely about advertising
* Have regular "sponsored" posts
* Have "sponsored" competitions
* Hold events
* Have their logo in the banner
* Coupon codes - % of profit can be allocated to me

Additionally was thinking of referrals, they do custom fabrication work and would be great if I could get a commission for successfully referring them business.

Any ideas appreciated!